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Ok, this is a dificult one, but I think that my answer is somewhere between oddguy's and paramiteabe's.
I beleive that a persons concious... um... being is a soul. In other words, I beleive that my body's soul is the thing that is typing the words on this very post. I am the soul that inhabits my body, just like the thing that is reading this is yours. But there are alterations on the soul, like oddguy said (Hunger, greed, ect) and with those alterations, you get your mind. When a person dies, they are freed from the body, as well as the alterations, and then go to wherever.
That's my thoughts.